package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        Long categoryId = dishDto.getCategoryId();
        String key = "dish_" + categoryId + "_" + dishDto.getStatus();
        redisTemplate.delete(key);
        return R.success("成功");
    }

    /**
     * 分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> select(int page, int pageSize, String name) {
        //分页构造器
        Page<Dish> dishPage = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.orderByAsc(Dish::getCategoryId).orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        queryWrapper.like(name != null, Dish::getName, name);
        dishService.page(dishPage, queryWrapper);
        //把内容移植到新泛型的构造器
        BeanUtils.copyProperties(dishPage, dishDtoPage, "records");
        //获得records
        List<Dish> records = dishPage.getRecords();
        //处理records
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);

    }

    /**
     * 根据id查询菜品和口味
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id) {
        DishDto dishDto = dishService.getByidWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
//        全部清理
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        //精准清理
        Long categoryId = dishDto.getCategoryId();
        String key = "dish_" + categoryId + "_" + dishDto.getStatus();
        redisTemplate.delete(key);
        return R.success("成功");
    }

    /**
     * 删除菜品
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        ;
        dishService.removeBatchByIds(ids);
        dishFlavorService.rmByDishId(ids);
        return R.success("删除成功");
    }

    /**
     * 根据id启用弃用dish
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> changeStatus(@PathVariable int status, @RequestParam List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    /**
     * 菜品分类查询
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> list = null;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //先从Redis获取数据
        list = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //如果存在，直接返回，不访问数据库
        if (list != null) {
            return R.success(list);
        }
        //不存在，查库，缓存到Redis

        //构造查询
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //开卖的商品
        queryWrapper.eq(Dish::getStatus, 1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> dishes = dishService.list(queryWrapper);

//        BeanUtils.copyProperties(dishes,list);
        list = dishes.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //菜品Id
            Long id = item.getId();
            LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
            dishFlavorLambdaQueryWrapper.eq(DishFlavor::getId, id);
            List<DishFlavor> flavors = dishFlavorService.list(dishFlavorLambdaQueryWrapper);
            dishDto.setFlavors(flavors);
            return dishDto;
        }).collect(Collectors.toList());
        redisTemplate.opsForValue().set(key, list, 30, TimeUnit.MINUTES);

        return R.success(list);
    }
}
